alterWal - Kinetica Docs

◆ alterWal() [1/4]

AlterWalResponse gpudb::GPUdb::alterWal ( const AlterWalRequest & request_ ) const

Alters table write-ahead log (WAL) settings.

Returns information about the requested table WAL modifications.

Parameters

[in] request_ Request object containing the parameters for the operation.

Returns

Response object containing the result of the operation.

◆ alterWal() [2/4]

AlterWalResponse & gpudb::GPUdb::alterWal	(	const AlterWalRequest &	request_,
		AlterWalResponse &	response_ ) const

Alters table write-ahead log (WAL) settings.

Returns information about the requested table WAL modifications.

Parameters

[in]	request_	Request object containing the parameters for the operation.
[out]	response_	Response object containing the results of the operation.

Returns

Response object containing the result of the operation (initially passed in by reference).

◆ alterWal() [3/4]

AlterWalResponse gpudb::GPUdb::alterWal	(	const std::vector< std::string > &	tableNames,
		const std::map< std::string, std::string > &	options ) const

Alters table write-ahead log (WAL) settings.

Returns information about the requested table WAL modifications.

Parameters

[in]	tableNames	List of tables to modify. An asterisk changes the system settings.
[in]	options	Optional parameters. alter_wal_max_segment_size: Maximum size of an individual segment file. alter_wal_segment_count: Approximate number of segment files to split the WAL across. Must be at least two. alter_wal_sync_policy: Maximum size of an individual segment file. Supported values: alter_wal_none: Disables the WAL. alter_wal_background: WAL entries are periodically written instead of immediately after each operation. alter_wal_flush: Protects entries in the event of a database crash. alter_wal_fsync: Protects entries in the event of an OS crash. alter_wal_flush_frequency: Specifies how frequently WAL entries are written with background sync. This is a global setting and can only be used with the system options.table_names specifier ’*’. alter_wal_checksum: If true each entry will be checked against a protective checksum. Supported values: alter_wal_true alter_wal_false The default value is alter_wal_true. alter_wal_override_non_default: If true tables with unique WAL settings will be overridden when applying a system level change. Supported values: alter_wal_true alter_wal_false The default value is alter_wal_false. alter_wal_restore_system_settings: If true tables with unique WAL settings will be reverted to the current global settings. Cannot be used in conjunction with any other option. Supported values: alter_wal_true alter_wal_false The default value is alter_wal_false. alter_wal_persist: If true and a system-level change was requested, the system configuration will be written to disk upon successful application of this request. This will commit the changes from this request and any additional in-memory modifications. Supported values: alter_wal_true alter_wal_false The default value is alter_wal_true. The default value is an empty map.

Returns

Response object containing the result of the operation.

◆ alterWal() [4/4]

AlterWalResponse & gpudb::GPUdb::alterWal	(	const std::vector< std::string > &	tableNames,
		const std::map< std::string, std::string > &	options,
		AlterWalResponse &	response_ ) const

Alters table write-ahead log (WAL) settings.

Returns information about the requested table WAL modifications.

Parameters

[in]	tableNames	List of tables to modify. An asterisk changes the system settings.
[in]	options	Optional parameters. alter_wal_max_segment_size: Maximum size of an individual segment file. alter_wal_segment_count: Approximate number of segment files to split the WAL across. Must be at least two. alter_wal_sync_policy: Maximum size of an individual segment file. Supported values: alter_wal_none: Disables the WAL. alter_wal_background: WAL entries are periodically written instead of immediately after each operation. alter_wal_flush: Protects entries in the event of a database crash. alter_wal_fsync: Protects entries in the event of an OS crash. alter_wal_flush_frequency: Specifies how frequently WAL entries are written with background sync. This is a global setting and can only be used with the system options.table_names specifier ’*’. alter_wal_checksum: If true each entry will be checked against a protective checksum. Supported values: alter_wal_true alter_wal_false The default value is alter_wal_true. alter_wal_override_non_default: If true tables with unique WAL settings will be overridden when applying a system level change. Supported values: alter_wal_true alter_wal_false The default value is alter_wal_false. alter_wal_restore_system_settings: If true tables with unique WAL settings will be reverted to the current global settings. Cannot be used in conjunction with any other option. Supported values: alter_wal_true alter_wal_false The default value is alter_wal_false. alter_wal_persist: If true and a system-level change was requested, the system configuration will be written to disk upon successful application of this request. This will commit the changes from this request and any additional in-memory modifications. Supported values: alter_wal_true alter_wal_false The default value is alter_wal_true. The default value is an empty map.
[out]	response_	Response object containing the results of the operation.

Returns

Response object containing the result of the operation (initially passed in by reference).

​◆ alterWal() [1/4]

​◆ alterWal() [2/4]

​◆ alterWal() [3/4]

​◆ alterWal() [4/4]

◆ alterWal() [1/4]

◆ alterWal() [2/4]

◆ alterWal() [3/4]

◆ alterWal() [4/4]